package com.cn;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

@RequestMapping("/data/inteface")

public class CSDNTest {

    @RequestMapping("/getdata")

    public void getSolrArticleen(String parameter,

            HttpServletRequest request, HttpServletResponse response) throws Exception{

        String callback = request.getParameter("jsoncallback");

        parameter = new String(parameter.getBytes("iso-8859-1"), "utf-8");

        //获取数据

        DataRepository dataRepository = new DataRepository();

        List<String> primaryItems = dataRepository.getData();

        //把获取的数据转换成字符串，这里用的是FastJson,也可以根据需要用Gson

        String jsonArticle = JSONObject.toJSONString(primaryItems,

                SerializerFeature.DisableCircularReferenceDetect);

        //把需要输出的服务器端的字符串拼接callback头

        String json = callback+"(" + jsonArticle + ")";

        //输出到客户端

        GetOut.getWriter(json, response);

    }

}

package com.cn;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;

/**

 *

 * @Title: GetOut.java

 *

 * @Package: com.cn

 *

 * @Company: WiiMedia

 *

 * @Description: 获取输出流

 *

 * @author: SongJia

 *

 * @date: 2016-06-27 上午11:09:27

 *

 */

public  class GetOut {

    public static PrintWriter getWriter(String msg,HttpServletResponse response) throws IOException{

        response.setContentType("text/html;charset=utf-8");

        PrintWriter out = null;

        out = response.getWriter();

        out.write(msg);

        out.flush();

        out.close();

        return out;

    }

}

<script type="text/javascript">

    function AcquireData() {

        $.ajax({

            async:false,

            url: "http://m.lecoonginfo.com/data/inteface/getdata,  // 跨域URL

            type: 'GET',

            dataType: 'jsonp',

            jsonp: 'jsoncallback', //默认callback

            timeout: 5000,

                success: function (json) {

                 //客户端jquery预先定义好的callback函数，

                 //成功获取跨域服务器上的json数据后，

                 //会动态执行这个callback函数

                console.log(json);

                }

            }

        });

</script>